remove AsseticBundle after broken merge

Author: xabbuh

composer.json

@@ -17,7 +17,6 @@
         "incenteev/composer-parameter-handler": "~2.0",
         "sensio/distribution-bundle": "~4.0",
         "sensio/framework-extra-bundle": "^3.0.2",
-        "symfony/assetic-bundle": "~2.3",
         "symfony/monolog-bundle": "^3.0.2",
         "symfony/swiftmailer-bundle": "~2.3,>=2.3.10",
         "symfony/symfony": "2.8.*",